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|
#!env python
"""
# ===============================================================================
#
# FILE: ch_2.py
#
# USAGE: ./ch_2.py
#
# DESCRIPTION: Perl Weekly Challenge #095
# https://perlweeklychallenge.org/blog/perl-weekly-challenge-095/
# Demo Stack
#
# AUTHOR: Lubos Kolouch
# CREATED: 01/13/2021 02:39:16 PM
#===============================================================================
"""
class Stack:
""" Class to the stack """
def __init__(self):
self.stack = []
def push(self, value: int):
""" Demostrate push """
self.stack.insert(0, value)
@property
def pop(self):
""" Demonstrate pop """
try:
return self.stack.pop(0)
except IndexError:
return None
@property
def top(self):
""" Demonstrate top """
return self.stack[0]
@property
def stack_min(self):
""" Demostrate min """
return min(self.stack)
def test_cases():
""" Test cases """
stack = Stack()
assert stack.pop == None
stack.push(2)
assert stack.top == 2
stack.push(-1)
assert stack.top == -1
stack.push(0)
assert stack.top == 0
assert stack.pop == 0
assert stack.top == -1
stack.push(0)
assert stack.stack_min == -1
|
